During embryonic life, erythropoiesis is initiated in

During embryonic development, erythropoiesis initiates in the yolk sac, providing primitive erythrocytes. As development progresses, erythropoiesis shifts to the liver and spleen, where these organs support red blood cell production. Finally, in late gestation and after birth, erythropoiesis predominantly occurs in the bone marrow, particularly in the long bones and flat bones. The bone marrow houses hematopoietic stem cells that continuously generate red blood cells throughout life, ensuring the body's oxygen-carrying capacity. This sequential transition reflects the progressive maturation of hematopoietic tissues during embryogenesis and the establishment of the adult hematopoietic system.